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Dec. 29 1925- s. A. DoBYNE FASTENER STOCK SUPPLYING MECHANISM FORFASTENER INSERTING KACHINS Filed Nov. 25, 1922 5MP/fnv A oawvs,

Patented Dec. 29, 1925.

UNITED STATES PATENT OFFICE.

STEPHEN A. DOBYNE, OF ST. LOUIS, MISSOURI,

ASSIGNOR TO CHAMPION SHOE MA.-

CHINERY COMPANY, OF ST. LOUIS, MISSOURI, .A CORPORATION OF MISSOURI.

FASTENER-STOCK-SUPIELYING MEGHANISM FOR FASTENER-INSERTING MACHINES.

Application led November 25, 1922. Serial No. 603,287.

To all whom t may concern:

Be it known that I, STEPHEN A. DOBYNE, a citizen of the United States,and residing at St. Louis, Missouri, have invented the new and usefulImprovement in Fastener- Stock-Supplying Mechanism for Fastener-Inserting Machines, of which the following is a speciiication.

This invention relates to mechanism for feeding strands of fastenersfrom coiled sources of supply, and more particularly, to means forfeeding a strand of connected nails from a reel on which the strand iscoiled, to fastener inserting mechanism whichsevers the nails from thestring and drives them.

Fastener insertingmachines utilizing strands of connected nails have thefastener stock coiled o-n a reel or reels mounted on the machine; thestrand of connected nails is conducted or fed from the coiled source ofsupply to the operating means which completely severs the partiallysevered nail from the string and drivesit. In such a machine the stringis fed by the engagement with the head of a nail on the string in orderto insure the accurate cutting of the nail just above its head. A stopor pawl is provided to arrest retrograde movement of the strand, thispawl engaging the head of a nail on the string so as to insure accuratepositioning of the strand. y

This strand should have its nails as nearly severed as possible without,however, causing the strand 'to become broken, as the operation of themachine is thereby interfered with and a piece of work into which thefasteners are driven 'may thereby become spoiled. Accordingly violentvkinking or twisting of the strand must b e avoided in order to preventsuch parting. In orderto permit shipment and utilization of the fastenerstock, it should, of course, be coiled so as to not only present thesmallest possible space, but also to ermit ready delivery of 'thestrand. Suc a coil should, of course, be wound as closely as possible inorder to not only save space, but also prevent tangling of the coils.

In order to obtain all of these desirable features, a limitation ordiiiculty is encountered which is essentially inherent in coiledfastener stock strands and more especially in strands of connectednails. Such a. strand presents a series of lateral projections. formedby the heads of the nails, which are liable to become caught lin theadjacent coils on the reel so that when it is attempted to unreel thestrand from its coiled source, the strand is liable to become kinked oreven brok-n, where it is the weakest, namely where one nail point joinsthe adjacent nail head.

One of the objects of this invention, therefore, is to provide mechanismof the class described which is constructed to cause release of thestrand at the source and to loosen the unwinding coil at the source ofsupply.

Another object is to provide mechanism of the class described which isconstructed to not only insure delivery of the strand but also toprevent binding, kinking and breaking of the strand.

Another object is to provide mechanism of the class described whereby aretrograde tension is applied to the strand in order to insure accuratepositioning, feeding and delivery of the strand to operating mechanism.

Further objects will appear from the detail description taken inconnection with the accompanying' drawing, in which:

Figure l is a front elevation showing the mechanism embodying thisinvention and its mounting upon 'the machine;

Figure 2 is a section on line 2 2, Figure l;

Figure 3 is a detail showing the attachment of the reel bracket to thefastener inserting machine;

Figure 4 is a section on line 4-4, Figure 3;

Figure 5 is a section on line 5--5, Figure 2, showing the ratchet anddetent mechanism for restraining the movement of the wheel;

Figure 6 is another detail of the same l mechanism;

Figure 7 is a section on line ure 6;

Figure S is an enlarged detail of the connection between the reel andits iiange; and Figure 9 is a detail of the reel fastening. Referring tothe accompanyin drawing, the invention is shown as applie to a. fas-7-7, Figbeing that shown in application 'tener inserting machine of thewell known string nail type, the particular embodiment v Serial Number174,096, filed June 11, 1917, Patent No. 1,507,667, Sept. 9, 1924.

Mountedvon a cross-beam 15 on the machine head is a bracket 16. Thisbracket is provided with an undercut portion 17 taking over one of theflanges of the beam and having a 1i 13 taking underneath the beam. Aclamping element 19 has a channel 20 engaging the opposite edge of thebeam and has -a web 21engaging a cut out portion 22 in the bracket 16.One or more studs 23 tapped into the bracket passing through theclamping element 19 and provided with nuts 24 operate Vto securely clampthe bracket in position on the,machinel head. It will, therefore,l beseen that the bracket is detachably mounted on the machine head,embraces `the beam and is securely clamped in position. ln order toreadily locate the bracket on the machinev head, the cross-beam 15 isprovided with lugs 25 which are spaced to receive the bracket andclamping element therebetween.

Mounted on the end of the bracket is a split bearing 26 arranged toreceive a shaft 27 which is clamped in the bearing. This shaft 27 isarranged to receive the hubs 28 of a series of reels 29. These reels maybe construct-ed as shown in detail in Figure 8. Each reel comprises alhalf member 51 which may be integral with the hub mounted thereon andwhich is provided with a seat 52 for the coil of fastener stock A and aradial flange 53. lntern'ally of the iange 52 one or more bosses 54 maybe provided to accommodate a spring-pressed. locking pin 56 providedwith an elongated head 57 adapted to pass through the key-hole-shapedslot 53 in a loose flange 50 by means of which said iange 5() may bedetachably secured to the part 51, the head 57 being passed through thehole and turned through a right angle.

rlhe shaft 27 is long enough to permit a series of reels to be arrangedtherealong, depending upon the number of strands of fastener' steekwhich it is intended to employ inthe particular machine underconsideration.

The shaft 27 is provided with a series of grooves 30 providing surfacesof smaller diameter than the shaft so as to form side shoulders 'asshown more particularly in Figure 6. Each of these reduced portionsformthe grooves is toothed as shown in Figure 7 in preferably about asixty ldegree angle so as to provide rising and falling 'surfaces. Theseteeth are adapted to be engaged by a detent 31 having its end arrangedat the same angle and sliding in a tube 32 tapped into thfe hub 28.l Thedetent has a reduced vsha'rik 133 which passes through the end of thetube so threaded to receive a 'stopnut 34 and is encircled by a spring35. The spring operates to hold the detent in firm engagement with thetoothed part 30 while the stop 34 prevents inward movement too far ofthe detent when the reel is removed from the shaft. ln order to permitready placementof the reel on the shaft, the end of the latter is conedas shown at 36 so as to permit the detent to readily slide on the shaft.After the reel is in place, it will drop into the reduced portion, andthis detent engaging with the shoulders on the reduced portion willeffec-tually retain the reel against endwise movement on its shaft ltwill be understood, of course, that the shaft, and more particularly thetoothed portion 30 and the detent 31 are hardened to prevent wear.

During the operation of the fastener inserting machine, the movement ofthe feeding and cutting member will, as heretofore described, feed thestrand step by step and intermittently. As the strand is fed there isapplied a pull thereon tending to move the reel in the direction of thearrow, Figure 1, so as to unwind the coil on the reel. This movement is,however, restrained by the engagement of` the detent on'the reel withthe toothed portion on the shaft. The result is, therefore, thatthetension device 37 is placed under' tension. As the-pull applied to thestrand continues,'tlie tension of the spring 43 increases until, at thetermination of each step of the feed, sufficient tension is applied tothe reel to overcome the tension between the teeth and the detent.detent rises to the top of the tooth so that the tension of the reel issuddenly released. rlfhe result, therefore,is that the device 37 Liovessuddenly from` dotted to full line position, Figure 1. the reel isreleased by its detent to make a partial revolution. As a. strand is fedintermittently by the feeding mechanism of the machine to which thisdevice is attached, the tension device 37 is intermittently tensionedand released as the f'* reel. 29 is intermittenti;T rotated with theresult that the strand of stock is given a motion as it leaves the reel,which motion is effective in causing a strand to release itself from theremaining stock on the reel. The result is, therefore, that the strandis released at its source by loosening the unwinding coil, leaving thesource., from the remaining coils on the reel. vThis insures that thestrand coil being unwonnd is Sepa- Atthis time the rated from theadjacent coil or coils not by a pulling movement, but by a straightoutward movement or a radial movement, applied tothe coil over half ofits circumference, so that this coil is in edect loosened-by a radialmovement, so that the heads lof the nails of that coil cannot. catch. Asa result, therefore, over half of'a coil is continually beingv loosenedand unwound, and remains unwound during the operation of the ma- Cilchine, so that there is no pulling actionat all and all danger ofkinking and breaking is, therefore, avoided.

It is obvious that various changes Vmay be made in details ofconstruction without departing from the spirit of this invention; it is,therefore, to be understood that this invention is not to he limited tothe specific construction shown and described.

Having thus described the invention, what is claimed is:

l. Mechanism for feeding a strand of fastener stock from a reel to meansfor operating on fastener stock, comprising, means for restraining thereel adapted to cause sudden release thereof.

2. Mechanism for feeding a strand of fastener stock from a reel to meansfor operating on fastener stock, comprising, means for restraining` thereel adapted to cause sudden release thereof at the termination ofV astep of the feed of the strand.

3. Mechanism for feeding' a strand of fastener stock from a coiledsource 0f supply to operating means, comprising, a shaft, a reel mountedfor rotation thereon, and restraining means adapted to cause suddenrotation of said reel on said shaft.

4. Mechanism for feeding a strand of fastener stock from a coiled sourceof supply to operating means, comprising, a shaft, a reel mounted forrotation thereon, and toothed mechanism adapted to restrain rotation ofsaid reel on said shaft constructed and arranged to caused suddenrelease of said reel at the termination of a step of the feed of thestrand. l

5. Mechanism for feeding a strand of fastener stock from a. coiledsource of supply to operating means.v comprising, a shaft, a reelmounted for rotation thereon, and toothed means' on said shaft engagedby a detent on said reel constructed and arranged to cause suddenrelease of said reel at the termination of a step of the feed of thestrand.

6. Mechanism for feeding a strand of fastener stock from a coiled sourceof supply to operating means, comprising, a shaft, a reel mounted forrotation thereon, and means for restraining rotation of said reel onsaid shaft adapted to retain said reel in position on said shaft.

.7. Mechanism for feeding a strand of fastener stoel; from a coiledsource 0f supply to operating means, comprising, a shaft, a reel mountedfor rotation thereon, and toothed means on said shaft engaged by adetent on said rcel adapted to restrain rotation of and retain said reelon said shaft.

S. Mechanism for feeding a strand of fastener stock from a coiled sourceof supply to operating means, comprising, a shaft, a series of reelsmounted for rotation thereon, and restraining means between said reelsand said shaft adapted to retain said reels in definite angularpositions and constructed and arranged to cause sudden release of saidreel at the termination of a step of the feed of the strand.

9. Mechanism for feeding a strand of fastener stock from a coiled sourceof supply to operating means, comprising, a shaft, a series of reelsmounted for rotation thereon, toothed means on said shaft, and detentson said reels engaging said means, adapted to retain said reels on saidshaft.

l0. Mechanism for feeding a strand of fastener stock from a coiledsource of supply to operating means, comprising, a shaft, ay reelmounted for rotation thereon, and toothed means on said shaft engaged bya detent on said reel, adapted to retain said reel on said shaft but topermit replacement of said reel on said shaft.

l1, In a fastener inserting machine, the employment of a fastener stockreel, co1nprising a hub, a web and spaced fianges, and means fordetachably securing one of said flanges to said web adapted to permitloading of the reel.

12. In a fastener inserting machine, the employment of a fastener stockreel, comprising, a hub, a web and spaced flanges, and yielding meansfor detachably securing one of said flanges to said web adjacent saidhub adapted to permit loading of the reel.

In testimony whereof I affix my signature this 19th day of September,1922.

STEPHEN A. DOBYNE.

